👔 (comment bg) add command background helper

add command background helper and implemented on edit user service

src/helpers/files/saveFile/modules/saveCommentBackgorund.ts

@@ -0,0 +1,21 @@
+import { saveFile } from "..";
+import { AppError } from "../../../error/instances/app";
+
+export const saveCommentBackground = async (file: File): Promise<string> => {
+  if (Array.isArray(file)) {
+    throw new AppError(415, "Can't upload more than 1 file");
+  }
+
+  const allowedTypes = ["image/png", "image/jpeg", "image/webp"];
+  if (!allowedTypes.includes(file.type)) {
+    throw new AppError(
+      415,
+      "Unsupported Media Type. File must be in .jpg, .png, or .webp format"
+    );
+  }
+
+  return await saveFile(file, {
+    folder: "comment-backgorund",
+    prefix: "cmnt-bg-",
+  });
+};